Effects of St. John's Wort on the Effectiveness of Oral Contraceptives

August 17, 2006 updated by: National Center for Complementary and Integrative Health (NCCIH)

Effects of Hypericum Perforatum on Effectiveness of Oral Contraceptives

The purpose of this study is to evaluate the effects of a common herbal remedy, St. John's Wort, on the effectiveness of birth control pills. St. John's Wort has recently been shown to increase metabolism of some drugs. If it could increase metabolism of oral contraceptives as well, it may increase the risk of contraceptive failure and unintended pregnancy. Study participants will be evaluated for risk of ovulation on oral contraceptives before and during simultaneous therapy with St. John's Wort.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

See Brief Summary

Study Type

Interventional

Enrollment

25

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • New York
      • New York, New York, United States, 10032
        • Columbia University Department of Obstetrics & Gynecology

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

14 years to 36 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

Female

Description

Inclusion Criteria:

  • Women taking or willing to take low dose oral contraceptives for 5 months
  • No contraindications to hormonal contraception

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Non-Randomized
  • Interventional Model: Single Group Assignment
  • Masking: Single

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

National Center for Complementary and Integrative Health (NCCIH)

Investigators

  • Principal Investigator: Patricia Murphy, DrPh, Columbia University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

January 1, 2002

Study Completion

January 1, 2004

Study Registration Dates

First Submitted

November 5, 2001

First Submitted That Met QC Criteria

November 5, 2001

First Posted (Estimate)

November 6, 2001

Study Record Updates

Last Update Posted (Estimate)

August 18, 2006

Last Update Submitted That Met QC Criteria

August 17, 2006

Last Verified

July 1, 2006

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • R21AT000836-01 (U.S. NIH Grant/Contract)

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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